The 12 Levers: How to Change Your Life with Things You Actually Control (Hardcover) (ISBN-13: 9780306837463)

Spencer has a PhD in applied math from NYU, with a specialty in machine learning. Spencer's work has been featured by numerous major media outlets, such as Forbes, The New York Times, the Wall Street Journal, the Independent, Lifehacker, Gizmodo, Fast Company, and the Financial Times. Spencer also has extensive public speaking experience having done multiple talks including two TEDx talks here and here.

Jeremy Stevenson has a PhD from Flinders University and has published in academic journals (e.g., here, here, here, here), as well as outside of academia here. In addition to print publications, he has also appeared on various media platforms like radio and newspaper discussing his research. As well as a researcher, Jeremy is a clinical psychologist and has accrued thousands of hours of experience across hundreds of clients. He has studied self-help techniques both inside and out. He's received dozens of therapy hours himself and attributes some fundamental transformations to this experience with excellent therapists.

When he completed his PhD he took a year off to study mindfulness meditation intensively - sitting month long retreats in Australia and Malaysia before doing a three-month retreat in Nepal. He's tried every single one of the major self-help approaches in our list, including an experience of imagery rescripting that permanently increased his self-compassion, as well as a self-transcendent experience on a meditation retreat that has dramatically reduced his suffering years later. Jeremy also has extensive public speaking experience - he once did a job in his early 20s selling volunteer travel packages at North American universities that involved racing around doing dramatic announcements to packed auditoriums as well as full days of information sessions. During his PhD he won Flinders University's People's Choice Award for the 3-Minute Thesis in 2015, a competition in which you present your thesis to a lay audience. Jeremy works with Spencer at Spark Wave. You can listen to Jeremy on Spencer's podcast discussing meditation here.